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    def __init__(self):
        logger.info('Setting up chrome web driver.')

        chrome_options = webdriver.ChromeOptions()

        chrome_options.add_argument("--headless")
        chrome_options.add_argument("--no-sandbox")
        chrome_options.add_argument("window-size=1400,2100") 
        chrome_options.add_argument('--disable-gpu')

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FROM python:3.7

RUN apt-get update 
RUN apt-get install -y gconf-service libasound2 libatk1.0-0 libcairo2 libcups2 libfontconfig1 libgdk-pixbuf2.0-0 libgtk-3-0 libnspr4 libpango-1.0-0 libxss1 fonts-liberation libappindicator1 libnss3 lsb-release xdg-utils

#download and install chrome
RUN wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
RUN dpkg -i google-chrome-stable_current_amd64.deb; apt-get -fy install

#install python dependencies

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Dockerfile

# Stage 1
FROM microsoft/dotnet:2.2-sdk AS builder
WORKDIR /source

# caches restore result by copying csproj file separately
COPY *.csproj .
# COPY NuGet.Config .
RUN dotnet restore

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""" Scheduler URLs """
from django.conf.urls import url
from rest_framework.urlpatterns import format_suffix_patterns

from . views import SchedulerView
from . scheduler import Scheduler


urlpatterns = {
    url(r'^', SchedulerView.as_view(), name='scheduler')

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""" Scheduler Singleton """
import sched
import time
import datetime
import threading
import logging

from multiprocessing import Process, log_to_stderr

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mvn archetype:generate -DgroupId=com.test.app -DartifactId=test-app -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

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// Project name (artifact name in Maven)
name := "(project name)"

// orgnization name (e.g., the package name of the project)
organization := "com."

version := "1.0-SNAPSHOT"

// project description
description := "(project description)"

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[Unit]
Description=vault server
Requires=network-online.target
After=network-online.target consul.service

[Service]
EnvironmentFile=-/etc/sysconfig/vault
Restart=on-failure
ExecStart=/usr/local/sbin/vault server $OPTIONS -config=/etc/vault.d
ExecStartPost=/bin/bash -c "for key in $KEYS; do /usr/local/sbin/vault unseal $CERT $key; done"

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scala> class Foo { self: Singleton => }
defined class Foo

scala> class Bar extends Foo
<console>:12: error: illegal inheritance;
 self-type Bar does not conform to Foo's selftype Foo with Singleton
       class Bar extends Foo
                         ^

scala> object Bar extends Foo

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import akka.actor.ActorSystem
import akka.event.{Logging, LoggingAdapter}
import akka.http.scaladsl.Http
import akka.http.scaladsl.client.RequestBuilding
import akka.http.scaladsl.marshallers.sprayjson.SprayJsonSupport._
import akka.http.scaladsl.marshalling._
import akka.http.scaladsl.model._
import akka.http.scaladsl.model.StatusCodes._
import akka.http.scaladsl.server.Directives
import akka.http.scaladsl.server.Directives._